Sound-regulator.



.Patented July 18, 1916.

A. G. MARQUIS.

SOUND REGULATOR.l APPLICATION FILED APR. l2, 1915.

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IALEXANDER G. MARQUIS, OF ROCHESTER, NEW'YORK, ASSIGNOR 0F ONE-FOURTH T0 GEORGE W. ROGERS AND ONE-FOURTH TO ANITA yB. ROGERS, BOTH OF ROCHESTER,

NEW YORK.

SOUND-REGULATOR.

Specification of Letters Patent.

Patented July 18, 191C.

Application med Aprilia, 1915. yserial No. 20,702.

G. MAR- QUIs, a subject of the King of Great Britain,

residing at Rochester, in the county of Monroe andy State of New York, have invented certainv new and useful Improvements in vSound-Regulators, of which the following is a specification.

The object of this invention is to provide a new and improved device for varying the volume of sound produced more especially by aV talking machine 01 for reducing land vsuppressing a part of the sound so as to prevent confusion and interference of the sound waves. This and other objects of the invention will be fully illustrated in the drawings, described in the specification and pointed out in the claims at the end thereof.

In'the drawings, Figure 1 is a vertical sec- -tion through a talking machine of the disk record type showing my improvement embodied therein, the section being taken on the line lX-lX of Fig. Q. Fig. 2 is a section on the line 2X-2* of Fig. l. Fig. 3 is an elevation of a `handle for` Operating the valve. Fig. 4 is a perspective View of one ofthe auxiliary silencing chambers on the 'side of the cabinet.

In the drawings like reference numerals indicate like parts. A

In the drawings reference numeral 1 indicates the` cabinet of a disk record talking machine on which is mounted to rotate the platen 2 on which the disk is supported and the overhangin-g arm 3 that carries the diaphragm and needle` point. Inside of the cabinet is a sounding horn 4 which extends downward and forward. The vertical part of this horn is cut away at 5 to provide an opening and adjacent to this opening is pivoted in the horn a valve 6 that is adapted to close the opening when in one position or is adapted to close the vertical passage in the horn when it is'in another position, the valve being capable of being set in any position intermediate of these two extreme positions. This valve operates to deiiect the sound as it passes down through the vertical part of the horn and the sound is deflected thereby in proportion to the extent that the valve is moved to the right in Fig. 1, the valve operating to intercept the sound waves and deect them through the opening 5 so that the transmission of the sound waves below the valve is correspondingly reduced and the sound. produced thereby is correspondingly less. The waves that are intercepted by the valve 6 are thrown outside of the horn and into the cabinet above the horn where they have' little or no disturbing effect and are not thrown back toward the diaphragm where they would cause interference with the oncoming vsound waves produced, by the diaphragm,

interfering with the. quality ofthe sound or tone produced by the diaphragm,l as is at present the case with the devices now in use. The valve is preferably shaped so that when placed in full line position it will completely close the vertical 'passage in the horn and'reduce the sound produced 'by the instrument to a minimum which reduction however, will be secured without any impairment of the quality ofv the sound.

To vary the effect whichthe valve has on the sound I provide a series of openings in one or both sides of thel cabinet which openings are illustrated at 7, S, 9 and 10 in Fig. 1. Mounted to slide in the cabinet adjacent to this opening is the plate 11 having corresponding openings 12, 13, 14 and 15 therein, ywhich openings may be placed wholly in or Aout of register witlhthe openings in the cabinet or in any intermediate positions between these extremes for the purpose of modifying the effect of the sound waves deflected into the cabinet by the Vvalve 6. To still further modify or dampen the sound waves I provide a screen or diaphragm 1G of any thin cloth or other suitable material .for covering the openings 7, 8. 9 and 10.

sound waves are deflected from the lowerI00 part of the cabinet which contains the horn. On the outside of the cabinet is placed the auxiliary silencingchambers 1S and 19.4

It will be understood that openings through the cabinet lead into the chamber 19 and that a slide and screen is provided for controlling said openings linst as has already been explained inl connection with the silencing chamber 18. The silencing chambersY 18 and 19 taper from the front to the rear `110 combination of a horn or close the 'valve Concentric with the shaft 23 is a disk 25 having a segmental slot 26 therein in which engages a clamping screw 27 by which this disk may be set in any angular position desired. On this disk is carried a lug 28 which serves to arrest the handle 24. Connected to the valve 6 1s a spring 29 which spring operates to dran7 the valve open and the valve may he arrested in any intermediate position or held closed by shifting the disk 25 and clamping it in position so that the lug 28 Will arrest* the handle 24 at the desired point.

As shown in Fig. 2 the horn used in connection with my apparatus is preferably arched at the top and flat at the bottom.

I claim.

1. In a` sound producing apparatus the combination of a horn and a valve mounted in the side of the horn .covering an opening' in the side of the horn, said valve being adapted to be moved across the horn so as to uncover the opening in the sidey of the horn and close the passage through the horn, a chamber communicating with said opening -to receive the waves of sound so deflected, and diaphragms in said chamber to modify the sound waves deflected into said chamber.

2. In a sound producing apparatus the combination of a horn and a valve mounted in the side of the horn covering an opening in the side of the horn, said valve being adapted, to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn, and a muling chamber separate'from said horn to receive and silence the Waves of sound so deflected.

3. In a sound producing apparatus the combination of a horn and a valve mounted in the side of the horn covering an opening in the side of the horn, said valve being adapted to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn and a mufHing chamber adjacent to said opening to receive and silence or modify the Waves of sound so deflected, openings in said mufilingchamber, a valve for varying the size of said openings and an auxiliary mufiling chamber outside of said openings.

4. In a sound producing apparatus the and a valve mounted in the Side of the horn covering an opening in the side ofthe horn, said valve being adapted to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn, and a muflling chamber separate from said horn to receive and silence the waves of sound so deflected, openings in said muffling chamber and a valve for varying the size of said openings.

5. In a sound producing apparatus the combination of a horn and a valve mounted in the side ofthe horn covering an opening in the side of the horn, said valve being adapted to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn and a' mufiling chamber adjacent to said Opening to receive and silence or modify the Waves of sound so deflected, openings in said muflling chamber, a valve for varying the size of said openings and a screen in combination with said valve openings.

6. In a sound producing apparatus the combination of a horn and a valve mounted in the side of the horn covering an opening in the side of the horn, said valve being adapted to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn, and a mufiling chamber separate from said horn adjacent to said opening to receive and silence the waves of sound so deflected, and devices connected to said valve and extending to the outside of said mufiling chamber to permit the operation of the valve from the outside of the chamber and hold said valve in either of its extreme positions or at points intermediate thereof.

In a sound producing apparatus the combination of a horn and a valve mounted in the side of the horn covering an opening in the side of the horn, said valve being adapted to be moved across the horn so as to uncover the opening in the side of the horn and close the passage through the horn and .a muflling chamber adjacent to said opening to receive and silence or modify the Waves of sound so deflected, and devices connected to said valve and extending tothe' outside of said mufiling chamber to permit the operation of thel valve from the outside of the chamber and hold said valve/'in either of its extreme positions or at points intermediate thereof, said devices including a. rock shaft extending through the casing, a handle fastened to said rock shaft, a plate concentric with said shaft and having a stop thereon to arrest said handle, means `for holding said plate with itsasltop in different positions, and means for moving the valve to hold the handle against said stop.

- 8. In a sound producing apparatus the combmatlon of a horn and a .valve mounted 4in the side of' the horn covering an opening in the side of the horn, said valve being.

waves of sound sodelecfr l, openings in said.

chamber, and a sliding shutter for opening or closing said openings.

A sound producing apparatus 'comprising a cabinet having a revolving platen on the top thereof, a tone-arm-extending rearwardly over said platen and down into the cabinet, a horn, extending outwardly in the lower part thereof, a muiing chamber located in said cabinet and separate from said horn, an opening in saidv horn communicating with said chambenand a valve mounted in thehorn for uncovering said opening and closing the passage through the horn. i

In testimony whereof I aiiix my signature in presence of two. Witnesses.V y

ELEAN'OR M. CORCORAN, EDNA K. BOOTH.

` Copies of this patent` may be obtained for i'lve cents each, by addressing the Commissioner 'of Patents,

i i f Washington, D. C. 

